- remove commented code
- modify getInheritanceModelReferenceDict  method to use a Breadth First Search
  instead of Depth First Search witch is very more appropiate in this case.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@18344 20353a03-c40f-0410-a6d1-a30d3c3de9de